727, decode trouble

Hello FABO,

I am looking at buying a 727 and the seller doesn't know the history. He did provide the numbers next to the pan rail for me, but I am not having luck decoding it. http://sfbay.craigslist.org/eby/pts/5444969265.html
The number provided is 37782390923248 or 437782390923248

I have a pic but have never been too good at uploading them to FABO.


If anyone can shed some light on this that would be great.
Thanks.

Mike